K2-141 b: A 5- M ⊗ super-Earth transiting a K7 v star every 6.7 h

O. Barragán; D. Gandolfi; F. Dai; J. Livingston; C. M. Persson; T. Hirano; N. Narita; Sz Csizmadia; J. N. Winn; D. Nespral; J. Prieto-Arranz; A. M.S. Smith; G. Nowak; S. Albrecht; G. Antoniciello; A. Bo Justesen; J. Cabrera; W. D. Cochran; H. Deeg; Ph Eigmuller; M. Endl; A. Erikson; M. Fridlund; A. Fukui; S. Grziwa; E. Guenther; A. P. Hatzes; D. Hidalgo; M. C. Johnson; J. Korth; E. Palle; M. Patzold; H. Rauer; Y. Tanaka; V. Van Eylen

doi:10.1051/0004-6361/201732217

K2-141 b: A 5- M _⊗ super-Earth transiting a K7 v star every 6.7 h

O. Barragán, D. Gandolfi, F. Dai, J. Livingston, C. M. Persson, T. Hirano, N. Narita, Sz Csizmadia, J. N. Winn, D. Nespral, J. Prieto-Arranz, A. M.S. Smith, G. Nowak, S. Albrecht, G. Antoniciello, A. Bo Justesen, J. Cabrera, W. D. Cochran, H. Deeg, Ph EigmullerM. Endl, A. Erikson, M. Fridlund, A. Fukui, S. Grziwa, E. Guenther, A. P. Hatzes, D. Hidalgo, M. C. Johnson, J. Korth, E. Palle, M. Patzold, H. Rauer, Y. Tanaka, V. Van Eylen

Astrophysical Sciences

Research output: Contribution to journal › Article › peer-review

52 Scopus citations

Abstract

We report on the discovery of K2-141 b (EPIC 246393474 b), an ultra-short-period super-Earth on a 6.7 h orbit transiting an active K7 V star based on data from K2 campaign 12. We confirmed the planet's existence and measured its mass with a series of follow-up observations: seeing-limited Muscat imaging, NESSI high-resolution speckle observations, and FIES and HARPS high-precision radial-velocity monitoring. K2-141 b has a mass of 5.31 ± 0.46 M_⊗ and radius of 1.54_-0.09^+0.10 R_⊗, yielding a mean density of 8.00_-1.45^+1.83 g cm^-3 and suggesting a rocky-iron composition. Models indicate that iron cannot exceed ∼70% of the total mass. With an orbital period of only 6.7 h, K2-141 b is the shortest-period planet known to date with a precisely determined mass.

Original language	English (US)
Article number	A95
Journal	Astronomy and Astrophysics
Volume	612
DOIs	https://doi.org/10.1051/0004-6361/201732217
State	Published - Apr 1 2018

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

Keywords

Planetary systems
Planets and satellites: individual: EPIC 246393474 b
Stars: fundamental parameters
Stars: individual: EPIC 246393474
Techniques: photometric
Techniques: radial velocities

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10.1051/0004-6361/201732217

Cite this

Barragán, O., Gandolfi, D., Dai, F., Livingston, J., Persson, C. M., Hirano, T., Narita, N., Csizmadia, S., Winn, J. N., Nespral, D., Prieto-Arranz, J., Smith, A. M. S., Nowak, G., Albrecht, S., Antoniciello, G., Bo Justesen, A., Cabrera, J., Cochran, W. D., Deeg, H., ... Van Eylen, V. (2018). K2-141 b: A 5- M _⊗ super-Earth transiting a K7 v star every 6.7 h. Astronomy and Astrophysics, 612, Article A95. https://doi.org/10.1051/0004-6361/201732217

@article{96d79d4d3b314874952a4bca0236f609,

title = "K2-141 b: A 5- M ⊗ super-Earth transiting a K7 v star every 6.7 h",

abstract = "We report on the discovery of K2-141 b (EPIC 246393474 b), an ultra-short-period super-Earth on a 6.7 h orbit transiting an active K7 V star based on data from K2 campaign 12. We confirmed the planet's existence and measured its mass with a series of follow-up observations: seeing-limited Muscat imaging, NESSI high-resolution speckle observations, and FIES and HARPS high-precision radial-velocity monitoring. K2-141 b has a mass of 5.31 ± 0.46 M⊗ and radius of 1.54-0.09+0.10 R⊗, yielding a mean density of 8.00-1.45+1.83 g cm-3 and suggesting a rocky-iron composition. Models indicate that iron cannot exceed ∼70% of the total mass. With an orbital period of only 6.7 h, K2-141 b is the shortest-period planet known to date with a precisely determined mass.",

keywords = "Planetary systems, Planets and satellites: individual: EPIC 246393474 b, Stars: fundamental parameters, Stars: individual: EPIC 246393474, Techniques: photometric, Techniques: radial velocities",

author = "O. Barrag{\'a}n and D. Gandolfi and F. Dai and J. Livingston and Persson, {C. M.} and T. Hirano and N. Narita and Sz Csizmadia and Winn, {J. N.} and D. Nespral and J. Prieto-Arranz and Smith, {A. M.S.} and G. Nowak and S. Albrecht and G. Antoniciello and {Bo Justesen}, A. and J. Cabrera and Cochran, {W. D.} and H. Deeg and Ph Eigmuller and M. Endl and A. Erikson and M. Fridlund and A. Fukui and S. Grziwa and E. Guenther and Hatzes, {A. P.} and D. Hidalgo and Johnson, {M. C.} and J. Korth and E. Palle and M. Patzold and H. Rauer and Y. Tanaka and {Van Eylen}, V.",

note = "Publisher Copyright: {\textcopyright} ESO 2018.",

year = "2018",

month = apr,

day = "1",

doi = "10.1051/0004-6361/201732217",

language = "English (US)",

volume = "612",

journal = "Astronomy and Astrophysics",

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Barragán, O, Gandolfi, D, Dai, F, Livingston, J, Persson, CM, Hirano, T, Narita, N, Csizmadia, S, Winn, JN, Nespral, D, Prieto-Arranz, J, Smith, AMS, Nowak, G, Albrecht, S, Antoniciello, G, Bo Justesen, A, Cabrera, J, Cochran, WD, Deeg, H, Eigmuller, P, Endl, M, Erikson, A, Fridlund, M, Fukui, A, Grziwa, S, Guenther, E, Hatzes, AP, Hidalgo, D, Johnson, MC, Korth, J, Palle, E, Patzold, M, Rauer, H, Tanaka, Y & Van Eylen, V 2018, 'K2-141 b: A 5- M _⊗ super-Earth transiting a K7 v star every 6.7 h', Astronomy and Astrophysics, vol. 612, A95. https://doi.org/10.1051/0004-6361/201732217

TY - JOUR

T1 - K2-141 b

T2 - A 5- M ⊗ super-Earth transiting a K7 v star every 6.7 h

AU - Barragán, O.

AU - Gandolfi, D.

AU - Dai, F.

AU - Livingston, J.

AU - Persson, C. M.

AU - Hirano, T.

AU - Narita, N.

AU - Csizmadia, Sz

AU - Winn, J. N.

AU - Nespral, D.

AU - Prieto-Arranz, J.

AU - Smith, A. M.S.

AU - Nowak, G.

AU - Albrecht, S.

AU - Antoniciello, G.

AU - Bo Justesen, A.

AU - Cabrera, J.

AU - Cochran, W. D.

AU - Deeg, H.

AU - Eigmuller, Ph

AU - Endl, M.

AU - Erikson, A.

AU - Fridlund, M.

AU - Fukui, A.

AU - Grziwa, S.

AU - Guenther, E.

AU - Hatzes, A. P.

AU - Hidalgo, D.

AU - Johnson, M. C.

AU - Korth, J.

AU - Palle, E.

AU - Patzold, M.

AU - Rauer, H.

AU - Tanaka, Y.

AU - Van Eylen, V.

PY - 2018/4/1

Y1 - 2018/4/1

N2 - We report on the discovery of K2-141 b (EPIC 246393474 b), an ultra-short-period super-Earth on a 6.7 h orbit transiting an active K7 V star based on data from K2 campaign 12. We confirmed the planet's existence and measured its mass with a series of follow-up observations: seeing-limited Muscat imaging, NESSI high-resolution speckle observations, and FIES and HARPS high-precision radial-velocity monitoring. K2-141 b has a mass of 5.31 ± 0.46 M⊗ and radius of 1.54-0.09+0.10 R⊗, yielding a mean density of 8.00-1.45+1.83 g cm-3 and suggesting a rocky-iron composition. Models indicate that iron cannot exceed ∼70% of the total mass. With an orbital period of only 6.7 h, K2-141 b is the shortest-period planet known to date with a precisely determined mass.

AB - We report on the discovery of K2-141 b (EPIC 246393474 b), an ultra-short-period super-Earth on a 6.7 h orbit transiting an active K7 V star based on data from K2 campaign 12. We confirmed the planet's existence and measured its mass with a series of follow-up observations: seeing-limited Muscat imaging, NESSI high-resolution speckle observations, and FIES and HARPS high-precision radial-velocity monitoring. K2-141 b has a mass of 5.31 ± 0.46 M⊗ and radius of 1.54-0.09+0.10 R⊗, yielding a mean density of 8.00-1.45+1.83 g cm-3 and suggesting a rocky-iron composition. Models indicate that iron cannot exceed ∼70% of the total mass. With an orbital period of only 6.7 h, K2-141 b is the shortest-period planet known to date with a precisely determined mass.

KW - Planetary systems

KW - Planets and satellites: individual: EPIC 246393474 b

KW - Stars: fundamental parameters

KW - Stars: individual: EPIC 246393474

KW - Techniques: photometric

KW - Techniques: radial velocities

UR - http://www.scopus.com/inward/record.url?scp=85047202705&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85047202705&partnerID=8YFLogxK

U2 - 10.1051/0004-6361/201732217

DO - 10.1051/0004-6361/201732217

M3 - Article

AN - SCOPUS:85047202705

SN - 0004-6361

VL - 612

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

M1 - A95

ER -